Hot-air generator



(No Model.) G. s. SPERRY.

HOT AIR GENERATOR.

No. 308,288. Patented Nov. 18, 1884.

ments.

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GEORGE SOHUYLER SPERRY, OF NEIV RICHMOND, IVISGONSIN.

HOT-AIR GENERATOR.

SPECIFICATION forming part of Letters Patent No. 308,288, dated November 18, 1884.

Application filed February 2, 1884.

TOaZZ whom, it may concern:

Be it known that I, GEORGE S. SPERRY, a citizen of the United States, residing at New Richn'iond, in the county of St. Croix and State of IVisconsin, have invented a new and useful Hot-Air-Generator, of which the following is a specification, reference being had to the accompanying drawings. p

This invention relates to hot-air generators for stoves, and it has for its object to provide simple, inexpensive, and efficient means for drawing the/cold air off the floor into a suitable drum, utilizing the smoke and heated gases from a stove to heat the cold 'air within the drum, and finally distributing the heated air out into the room. WVith this end'in view the said invention consists in certain details of construction and combination of parts, as hereinafter set forth, and particularly pointed out in the claim.

In the accompanying drawings, Figure 1 is a side view illustrating my improved device in position for use. Fig. 2 is a vertical sec tional view of the drum. Fig. 3 is a trans verse sectional View. Fig. 4 illustrates aside view of my improved drum as applied to a cooking-stove.

Like letters refer to corresponding parts in the several figures.

Referring to the drawings, A designates the drum or cylinder, mounted on asuitablc number of legs, B, behind the stove O, a pipe, D, leading from the stove to the upper end of the drum, and arranged to conduct the smoke and heated gases into the drum, for the purposes presently to be described. The heads E F of the drum are detachable, as shown, a central pipe, G, being secured atone end to the lower head of the drum, and extending upward through a passage formed in the upper head, F, said pipe G being continued upward above the drum for any distance desired. Partitions H H divide the space around the central pipe into two compartments, I I, said partitions being fitted to the central pipe and extending downwardly to within a short distance of the bottom, so as to form openingsr' i,'which permit communication between the two compart- A pipe, J, is attached to the upper head, F, of the drum, and connects with the chimney to conduct the smoke and gases received from the stove.

The operation of nay-invention will be read- (No model.)

ily understood from the foregoing description, taken in connection with the annexed draw was.

The pipe D conducts thesmoke and gases from the heating-stove into the drum, and this smoke and gases circulate down through the compartment I, enter the compartment 1 through the openings 13, and then up the said compartment 1 and out through the pipe J, leading to the chimney. As the smoke and gases circulate in the drum in the manner described they heat the central pipe, G, which, being continually supplied with cold air from the floor, converts the said cold air into hot air, thelatter ascending through the pipe and distributing itself out into the room. Thus it will be seen that I am enabled to keep up a continual circulation of heated airintheroom, the cold air from the floor being drawn into the drum, and the heat from the stove being utilized to heat this cold air and throw it out into the room.

As shown in Fig. 4, I may use myimproved devices in connection with a cooking or box stove. The drum is arranged above the stove, suitable pipes being employed to conduct the smoke and heated gases from the stove to the drum. The central pipe arranged within the drum is provided with two extensions, one leading down to the ground to gather the cold air from off the floor, and the other extending upward to distribute the heated air within the room, a suitable pipe conducting the smoke.

and gases from the drum into the chimney. The operation of the device is substantially the same, the only difference being in the arrangement of the drum. 7

It will be seen that my improved devices act to gather the cold air from off the floor and store itinto a drum, and then utilize the wasted smoke and gases from the stove to heat the cold air and distribute it about the room. By this means I save the heat that would otherwise pass up the chimney and be wasted, and thus I effect economy in the amount of fuel to be consumed. The drum is also a good and effective radiator of the heat derived from the smoke and gases, acting likewise to heat the atmosphere of the room. My improved devices are simple, durable, inexpensive, efficient, and easily governed, and will prove of great service for the purposes described.

By means of the same the whole atmosphere of the room is completely changed, an even temperature being preserved as long as the fire in the room is kept going, the conversion of the cold air intohot air and the distribution of the latter about the room being continuous. It will save fuel and makes the room ,more healthy to live in, and the drum can be easily cleaned. The drum needs no watching, but

will regulate itself.

In order to define the nature, advantages, and scope of the present invention, I would have it understood thatI am aware of the patent to Small, No. 247,854, dated October 4, 1881, and do not claim anything shown therein, as it possesses numerous disadvantages which it is the object of my invention to avoid.

In the construction to which I lay special claim the heads of the drum are detachable, the central pipe being secured to the lower head and extending up through a passage in the upper head. The partitions are formed with the central pipe, so that the lower head, central pipe, and partitions may all be removed together for the purpose of cleaning the drum. Furthermore, in my apparatus the pipes D J are independent of each other and communicate separately with a compartment of the drum, the pipe D discharging all the smoke and gases into the compartment I, which descends and enters through the openings i into the other compartment, 1, ascending the latter and passing outthrough the pipe J into the chimney. In this manner all the smoke will circulate around the central pipe, so as to more effectually heat the cold air contained in the latter. It will be observed that my improvements make the apparatus more convenient and effective in use without adding in the least to the cost of the same.

Having described my invention, I claim In a hot-air generator, the combination, with a stove, of a drum, A, having detachable ends or heads E F, a central pipe, G, secured at one end to the lower head, F, and extending upward through a passage formed in the upper head, E, above the drum for any desired distance, partitions H H, secured to the central pipe on opposite sides and dividing the space around the pipe into two compartments, I I, the lower ends of the partitions being provided with openings 1', forming a means of communication between the compartments, pipe I), extending from the stove and discharging into the compartment I, and pipe J,

passing through the head E, so as to connect with the compartment 1, as set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

GEORGE SCHUYLER SPERRY.

\Vitnesses:

J. W. MoCoY, F. W. BARTLETT. 

